/*
Copyright 2019 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import EditorModel from "../../src/editor/model";
import { createPartCreator, createRenderer } from "./mock";
import DocumentOffset from "../../src/editor/offset";

describe('editor/model', function() {
    describe('plain text manipulation', function() {
        it('insert text into empty document', function() {
            const renderer = createRenderer();
            const model = new EditorModel([], createPartCreator(), renderer);
            model.update("hello", "insertText", new DocumentOffset(5, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(5);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello");
        });
        it('append text to existing document', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.plain("hello")], pc, renderer);
            model.update("hello world", "insertText", new DocumentOffset(11, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(11);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello world");
        });
        it('prepend text to existing document', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.plain("world")], pc, renderer);
            model.update("hello world", "insertText", new DocumentOffset(6, false));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(6);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello world");
        });
    });
    describe('handling line breaks', function() {
        it('insert new line into existing document', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.plain("hello")], pc, renderer);
            model.update("hello\n", "insertText", new DocumentOffset(6, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(1);
            expect(renderer.caret.offset).toBe(1);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello");
            expect(model.parts[1].type).toBe("newline");
            expect(model.parts[1].text).toBe("\n");
        });
        it('insert multiple new lines into existing document', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.plain("hello")], pc, renderer);
            model.update("hello\n\n\nworld!", "insertText", new DocumentOffset(14, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(4);
            expect(renderer.caret.offset).toBe(6);
            expect(model.parts.length).toBe(5);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello");
            expect(model.parts[1].type).toBe("newline");
            expect(model.parts[1].text).toBe("\n");
            expect(model.parts[2].type).toBe("newline");
            expect(model.parts[2].text).toBe("\n");
            expect(model.parts[3].type).toBe("newline");
            expect(model.parts[3].text).toBe("\n");
            expect(model.parts[4].type).toBe("plain");
            expect(model.parts[4].text).toBe("world!");
        });
        it('type in empty line', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([
                pc.plain("hello"),
                pc.newline(),
                pc.newline(),
                pc.plain("world"),
            ], pc, renderer);
            model.update("hello\nwarm\nworld", "insertText", new DocumentOffset(10, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(2);
            expect(renderer.caret.offset).toBe(4);
            expect(model.parts.length).toBe(5);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello");
            expect(model.parts[1].type).toBe("newline");
            expect(model.parts[1].text).toBe("\n");
            expect(model.parts[2].type).toBe("plain");
            expect(model.parts[2].text).toBe("warm");
            expect(model.parts[3].type).toBe("newline");
            expect(model.parts[3].text).toBe("\n");
            expect(model.parts[4].type).toBe("plain");
            expect(model.parts[4].text).toBe("world");
        });
    });
    describe('non-editable part manipulation', function() {
        it('typing at start of non-editable part prepends', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([
                pc.plain("try "),
                pc.roomPill("#someroom"),
            ], pc, renderer);
            model.update("try foo#someroom", "insertText", new DocumentOffset(7, false));
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(7);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("try foo");
            expect(model.parts[1].type).toBe("room-pill");
            expect(model.parts[1].text).toBe("#someroom");
        });
        it('typing in middle of non-editable part appends', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([
                pc.plain("try "),
                pc.roomPill("#someroom"),
                pc.plain("?"),
            ], pc, renderer);
            model.update("try #some perhapsroom?", "insertText", new DocumentOffset(17, false));
            expect(renderer.caret.index).toBe(2);
            expect(renderer.caret.offset).toBe(8);
            expect(model.parts.length).toBe(3);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("try ");
            expect(model.parts[1].type).toBe("room-pill");
            expect(model.parts[1].text).toBe("#someroom");
            expect(model.parts[2].type).toBe("plain");
            expect(model.parts[2].text).toBe(" perhaps?");
        });
        it('remove non-editable part with backspace', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.roomPill("#someroom")], pc, renderer);
            model.update("#someroo", "deleteContentBackward", new DocumentOffset(8, true));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(-1);
            expect(renderer.caret.offset).toBe(0);
            expect(model.parts.length).toBe(0);
        });
        it('remove non-editable part with delete', function() {
            const renderer = createRenderer();
            const pc = createPartCreator();
            const model = new EditorModel([pc.roomPill("#someroom")], pc, renderer);
            model.update("someroom", "deleteContentForward", new DocumentOffset(0, false));
            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(-1);
            expect(renderer.caret.offset).toBe(0);
            expect(model.parts.length).toBe(0);
        });
    });
    describe('auto-complete', function() {
        it('insert user pill', function() {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "@alice", label: "Alice" }]);
            const model = new EditorModel([pc.plain("hello ")], pc, renderer);

            model.update("hello @a", "insertText", new DocumentOffset(8, true));

            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(1);
            expect(renderer.caret.offset).toBe(2);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello ");
            expect(model.parts[1].type).toBe("pill-candidate");
            expect(model.parts[1].text).toBe("@a");

            // this is a hacky mock function
            // @ts-ignore
            model.autoComplete.tryComplete(); // see MockAutoComplete

            expect(renderer.count).toBe(2);
            expect(renderer.caret.index).toBe(1);
            expect(renderer.caret.offset).toBe(5);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello ");
            expect(model.parts[1].type).toBe("user-pill");
            expect(model.parts[1].text).toBe("Alice");
        });

        it('insert room pill', function() {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "#riot-dev" }]);
            const model = new EditorModel([pc.plain("hello ")], pc, renderer);

            model.update("hello #r", "insertText", new DocumentOffset(8, true));

            expect(renderer.count).toBe(1);
            expect(renderer.caret.index).toBe(1);
            expect(renderer.caret.offset).toBe(2);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello ");
            expect(model.parts[1].type).toBe("pill-candidate");
            expect(model.parts[1].text).toBe("#r");

            // this is a hacky mock function
            // @ts-ignore
            model.autoComplete.tryComplete(); // see MockAutoComplete

            expect(renderer.count).toBe(2);
            expect(renderer.caret.index).toBe(1);
            expect(renderer.caret.offset).toBe(9);
            expect(model.parts.length).toBe(2);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello ");
            expect(model.parts[1].type).toBe("room-pill");
            expect(model.parts[1].text).toBe("#riot-dev");
        });

        it('type after inserting pill', function() {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "#riot-dev" }]);
            const model = new EditorModel([pc.plain("hello ")], pc, renderer);

            model.update("hello #r", "insertText", new DocumentOffset(8, true));
            // this is a hacky mock function
            // @ts-ignore
            model.autoComplete.tryComplete(); // see MockAutoComplete
            model.update("hello #riot-dev!!", "insertText", new DocumentOffset(17, true));

            expect(renderer.count).toBe(3);
            expect(renderer.caret.index).toBe(2);
            expect(renderer.caret.offset).toBe(2);
            expect(model.parts.length).toBe(3);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("hello ");
            expect(model.parts[1].type).toBe("room-pill");
            expect(model.parts[1].text).toBe("#riot-dev");
            expect(model.parts[2].type).toBe("plain");
            expect(model.parts[2].text).toBe("!!");
        });

        it('pasting text does not trigger auto-complete', function() {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "#define-room" }]);
            const model = new EditorModel([pc.plain("try ")], pc, renderer);

            model.update("try #define", "insertFromPaste", new DocumentOffset(11, true));

            expect(model.autoComplete).toBeFalsy();
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(11);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("try #define");
        });

        it('dropping text does not trigger auto-complete', function() {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "#define-room" }]);
            const model = new EditorModel([pc.plain("try ")], pc, renderer);

            model.update("try #define", "insertFromDrop", new DocumentOffset(11, true));

            expect(model.autoComplete).toBeFalsy();
            expect(renderer.caret.index).toBe(0);
            expect(renderer.caret.offset).toBe(11);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("try #define");
        });

        it('insert room pill without splitting at the colon', () => {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "#room:server" }]);
            const model = new EditorModel([], pc, renderer);

            model.update("#roo", "insertText", new DocumentOffset(4, true));

            expect(renderer.count).toBe(1);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("pill-candidate");
            expect(model.parts[0].text).toBe("#roo");

            model.update("#room:s", "insertText", new DocumentOffset(7, true));

            expect(renderer.count).toBe(2);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("pill-candidate");
            expect(model.parts[0].text).toBe("#room:s");
        });

        it('allow typing e-mail addresses without splitting at the @', () => {
            const renderer = createRenderer();
            const pc = createPartCreator([{ resourceId: "@alice", label: "Alice" }]);
            const model = new EditorModel([], pc, renderer);

            model.update("foo@a", "insertText", new DocumentOffset(5, true));

            expect(renderer.count).toBe(1);
            expect(model.parts.length).toBe(1);
            expect(model.parts[0].type).toBe("plain");
            expect(model.parts[0].text).toBe("foo@a");
        });
    });
});
